Improvement in middlings-purifiers



J.. SCMITT.

Middlings-Puriervs.

Patented June 16, 1874.

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UNITED STATES JACOB SCHMITT, OF ST. LOUIS, MISSOURI.

IMPROVEMENT lN MIDDLINGS-PURIFIERS.

Specification forming part of Letters Patent No. 152,012, dated June 16, 1874 application filed April 21, 1874.

Zo all whom it may concern:

Beit known that I, JACOB SCHMITT, of St. Louis, Missouri, have invented an Improved Middlings-Separator, of which the following is a specification:

This invention relates chiefly to the combination of parts by which an improved separation of middlings is achieved, in manner now more fully to be described.

Of the drawing, Figure 1 is a longitudinal sectional elevation. Fig. 2 is a transverse sectional elevation 5 Fi 0'. 3, a front view or elevation. 4

A is the inclosing-frame, its bottom having slanting sides, connecting to a conveyer-box, A. Forming part of frame A, at one end, is a settlingcha1nber,B, this has a hin ged entrancedoor, O. Top of frame A and chamber B I provide drait horizontal spouts C C. These have open passages, so as to communicate with both sides of a fan-case, D, which is bctween said spouts. At c c', Fig. 1, each spout C C has an aperture or opening, connnunicat ing with interior of frame A or machine. Within fan-case is a revolving fan, 1). As the air enters the machine it is caused by the suction produced by the fan D to be drawn in currents up and through the lirst apertures c into the spouts C C', and thence into fan-case. Similarly', the air-currents passing the first apertures c are forced to enter the apertures c into the spouts, 'and thence to fan-case. I thus achieve a suctional force of air throughout the interior of the machine, which separates from the passing middlings its lighter stuit, i1npurities, Sac., and forces and carries saine with it in its passage into the spouts and fan-case above', thence said impurities are blown out. The middlin gs are fed into the hopper E, which contains a revolving brush, e, and which, catching the middlin gs, distributes them evenly to the top series of the shaking sievcs F. The sieves F consist of a frame having two sets of sieves arranged alternately, as shown at f j", Fig. 1, and so that every lower sieve, j", will be of finer cloth, while the upper, j", will be coarser. The sieves F by their frame are suspended from the frame A, so that by any proper connection to power-shaft, a reciprocating mot-ion is imparted to said sieves. The

shaking action of the sieves subject the middlings to aseparating action in their passage from and through the upper sieve series, down along and through the entire series, until said niiddlin gs are passed over the lower or bottom ot' the sieves. As each sieve is a separator in itself, the combined separating action, taking place as the middlings pass over the whole series of sievcs, produces a iiner and better quality. The purified iniddlings pass through the sieves into the conveyer below. Hence, Gis the conveyer, as usual. The conveyerbox A at bott-om has one or more slide-openings, 'roin which the final discharge of the purified middliugs or grades of middlings can bc had. The fan-shaft is operated by the beltin g H connecting to pulley of power-shaft Hf, the brush-shaft by belting h connecting to small pulley on power-shaft H. The conveyer-shaft has its pulley connected by belting h to pulley on p0wershaft.

The operation of the machine is, therefore, as follows: The middlin gs, being fed into the hopper E, are distributed by the revolving brush e evenly on the top series of the shakd ing sieves F. Here the iniddlings pass over and through the coarse and iine sievesff, and in its further passage over the entire sieves it will be noted that the suctional currents of air going on in the interior of the machine, as before described, act upon all particles of iniddlings, and subject same to a most complete separati on; and, further, in doing so, said A suctional force of air, passing in the direction of the fan-case, also carries with it all the light dust, impure matter, and separation effected from the iniddlings, leaving the purerv middlings to gravitate below into the conveyer. The impurities from iniddlings, not passing up and out with the air-currents through the apertures c, are still subject to be caught and forced out with the currents passing through the apertures c. The remaining heavier and coarser impure particles of the middlings fall from the lower sieve into the settling-chainber B. The apertures c c in the draft-spouts C O have slides by which the suctional force in the machine can be regulated. The sides of the frame A can have sliding doors, through which the sieves can be clean sed when desired.

What I claim is v l. The combination of the spouts C G, havaTnivT @Prien g ing apertures c c', fan D', sieves F, and fra-ine brush e, all arranged to operate as herein A, with its settling-chamber B, when Consliown and speeled.

strueted and arranged to operate in the nian-v In testimony of said invention I 11a-ve herener shown and described. unto set my hand. V 2. The combination of Jalle fain D', draft- JACOB SCHMITT.

spouts C G, having apertures c c', frzune A, Vi'cnesses:

settling-chamber B, conveyer G, reeiproeat XVILLIAM NV. HERTHEL,

ing sier-*es F, feeddiopper E, and revolving CHAS. F. MEISNER. 

